package api;

import com.fasterxml.jackson.databind.ObjectMapper;
import model.DBUtil;
import model.Job;
import model.News;


import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

@WebServlet("/api/news-list.json")
public class NewsList extends HttpServlet {
    private final ObjectMapper objectMapper = new ObjectMapper();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");
        List<News> newsList = new ArrayList<>();
        Object result;
        result = new Object(){
            public Object data = newsList;
        };
        try(Connection c = DBUtil.getConnection()){
            String sql = "SELECT * FROM admin  ORDER BY guid  DESC";
            try(PreparedStatement s = c.prepareStatement(sql)){
                try (ResultSet rs = s.executeQuery()){
                    while(rs.next()){
                       News news = new News();
                        news.guid = rs.getInt("guid");
                        news.aid = rs.getInt("aid");
                        news.atitle = rs.getString("atitle");
                        newsList.add(news);
                    }
                }
            }
        } catch (SQLException exception) {
            exception.printStackTrace();
        }
        String json = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(result);
        resp.setCharacterEncoding("utf-8");
        resp.setContentType("application/json");
        resp.getWriter().println(json);
    }
}
